How does one store and retrieve custom session variables in Drupal 6?

Question

Drupal employs a custom session handler that changes the familiar...:

$_SESSION[\'foo\'] = \'bar\';
echo $_SESSION[\'foo\'];

...behavior. The a

Answer 1

Ok, here's the answer - $_SESSION works for authenticated users as well as anonymous users as expected - if there are no other problems!

I discovered that I had the following problem; my Drupal "users" table (or in my case "drupal_users") was missing a user with a UID of zero ("0").

Drupal uses UID 0 to manage sessions in a database via its custom session handler. If that user doesn't exist in the table (it should be there by default installation), then Drupal cannot attach session information to the anonymous user.